Mathematical modelling of circulating fluidized bed reactors by reference to a solids decomposition reaction and coal combustion

Weiß, Volker; Fett, F.N.; Helmrich, Harald; Janssen, K.

doi:10.1016/0255-2701(87)80034-x

Cited by 21 publications

References 2 publications

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Modular Simulation of Fluidized Bed Reactors

Jafari

Sotudeh‐Gharebagh

Mostoufi³

2004

Chem Eng & Technol

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Simulation of chemical processes involving nonideal reactors is essential for process design, optimization, control and scale-up. Various industrial process simulation programs are available for chemical process simulation. Most of these programs are being developed based on the sequential modular approach. They contain only standard ideal reactors but provide no module for nonideal reactors, e.g., fluidized bed reactors. In this study, a new model is developed for the simulation of fluidized bed reactors by sequential modular approach. In the proposed model the bed is divided into several serial sections and the flow of the gas is considered as plug flow through the bubbles and perfectly mixed through the emulsion phase. In order to simulate the performance of these reactors, the hydrodynamic and reaction submodels should be integrated together in the medium and facilities provided by industrial simulators to obtain a simulation model. The performance of the proposed simulation model is tested against the experimental data reported in the literature for various gas-solid systems and a wide range of superficial gas velocities. It is shown that this model provides acceptable results in predicting the performance of the fluidized bed reactors. The results of this study can easily be used by industrial simulators to enhance their abilities to simulate the fluidized bed reactor properly.

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Modular Simulation of Fluidized Bed Reactors

Jafari

Sotudeh‐Gharebagh

Mostoufi³

2004

Chem Eng & Technol

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Modelling of circulating fluidized bed combustion of a char

1991

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The combustion of a char in the 41 mm ID riser of a laboratory circulating fluidized bed combustor has been investigated at different air excesses and rates of solids (char and sand) circulating in the loop. Riser performance was characterized by an axial oxygen concentration profile as well as by the overall carbon content and particle size distribution. The proposed model accounts for carbon surface reaction, intraparticle and external diffusion, and attrition. External diffusion effects were relevant in the riser dense region where char was potentially entrapped in large clusters of inert solids. Experimental data and results of the model calculations are in satisfactory agreement.

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Gas Mixing

Arena¹

1997

Circulating Fluidized Beds

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Mathematical modelling of circulating fluidized bed reactors by reference to a solids decomposition reaction and coal combustion

Cited by 21 publications

References 2 publications

Modular Simulation of Fluidized Bed Reactors

Modular Simulation of Fluidized Bed Reactors

Modelling of circulating fluidized bed combustion of a char

Gas Mixing

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